Re: how can i hide my text messages and phones calls
First you'd have to set up your notifications so that you do not get a visual notification on your lock screen when texts show up.
Then you use a passcode only you know.
Also be sure to lock up your phone manually as a habit because the shortest amount of time you can set it up to auto lock is one minute. A lot can happen in one minute.
But if your life has taken the kind of turn where you must hide everything on your phone from your significant other, then it's probably time to exit and start fresh.
Unless you're a habitual player: habitual players always get found out eventually, and no device will protect you from that.
Or... If you're in an ugly situation like I was in, years ago (ugly divorce) then you leave your original phone as is, get a new phone, new phone number, different carrier and only give that number to a select few people, keep it completely hidden from the person you're trying to hide your texts and call log from.